英德
有道
百度
谷歌
图片
维基
百科
坚硬度
flintiness
- 这便使这种锥体的机械性能更加稳定，坚硬度更大。
This results in a cone structure which is mechanically more stable and with superior stiffness. - 贝壳和沙子融合在了一起，形成了坚硬的水岩石，随着时间的增长，某次断裂后形成90度直角。
Concretions of shell and sand form hard sedimentary rock which over time fractures in straight lines and then at ninety degree angles. - 结果 青铜铁器时代的新疆、内蒙古人群牙齿磨耗度都大于近代人群，提示当时食物可能较近代人坚硬。
Results Tooth wear of Xinjiang and Inner Mongolia people was more obvious than modern human, which might indicate that food in Bronze-Iron ages was much rougher.
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中国词汇量第二的英语词典
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